Geschieberite, K-2(UO2)(SO4)(2)(H2O)(2), a new uranyl sulfate mineral from Jachymov

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F15%3A00087126" target="_blank" >RIV/00216224:14310/15:00087126 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/15:00451616 RIV/00023272:_____/15:#0002607
Result on the web
<a href="http://dx.doi.org/10.1180/minmag.2015.079.1.16" target="_blank" >http://dx.doi.org/10.1180/minmag.2015.079.1.16</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1180/minmag.2015.079.1.16" target="_blank" >10.1180/minmag.2015.079.1.16</a>

Result language
angličtina
Original language name
Geschieberite, K-2(UO2)(SO4)(2)(H2O)(2), a new uranyl sulfate mineral from Jachymov
Original language description
The new mineral geschieberite (IMA2014-006), K-2(UO2)(SO4)(2)(H2O)(2), was found in the Svornost mine, Jachymov, Czech Republic, where it occurs as a secondary alteration phase after uraninite in association with adolfpateraite and gypsum. Geschieberiteforms crystalline aggregates of bright green colour (when thick) composed of multiply intergrown prismatic crystals elongated on [001] typically reaching 0.1-0.2 mm across; observable forms are {010} and {001}. Crystals are translucent to transparent with a vitreous lustre. The mineral is brittle, with perfect cleavage on {100} and an uneven fracture. It has a greenish-white streak and a probable Mohs hardness of similar to 2. The mineral is slightly soluble in cold H2O. The calculated density is 3.259g cm(-3). The mineral exhibits strong yellowish-green fluorescence under both shortwave and longwave UV radiation. Optically, geschieberite is biaxial (-), with beta = 1.596(2) and gamma = 1.634(4) (measured at 590 nm), with X = a.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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Project
<a href="/en/project/GP13-31276P" target="_blank" >GP13-31276P: Uranium minerals, their crystal chemistry and behavior during weathering</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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